Coal cutting machine



Oct. 11, 1932.

N. D. LEVIN COAL CUTTING MACHINE Filed NOV. 30, 1928 Patented Oct. 11, 1932 UNITED STATES PATENT orl-" cs NILS n. LEVIN, or COLUMBUS, onro, Assrenon TO THE JEFFREY MANUFACTURING COMPANY, or COLUMBUS, 01110, A conronA'rron or OHIO co L CUTTING MACHINE I Application filed November 30, 1928. Serial No. 322,887.

The present invention relates to certain new anduseful improvements-in coal cutting machines of the type having an elongated cutter arm equipped with a cutter chain adapted to engage the coal to cut it when the cutterarm is presented edgewise t0 the body'of the. veln.

' It is the especial object of this invention to provide, ina machine of the class described, improvedlme'chanism for the actuatlon of the f, cutter chain having great strength, durabil ity and efiiciency, and of the vertical; dimensions suitable for use in extremely th n veins of coal.

Afurther object is to combine, in a machine such as above described, convenient'iand efficient means for the transmission of power from the motor of the mining machine to the wheels of a truck adapted forthe transporta tion of the machine from one working place in to another.

Themeans whereby I attaln these ob ects are fully set forth in thefollowing specification I and illustrated in, the accompanying .drawing'of which r Fig. 1 is a general plan view of a coal cutting 'machine of the class to which my present invention relates.

Fig. 2 is a sectional view taken along the line 11-11 of Fig. 1.- A

Fig. 3 isia sectional view taken along the line III- 1H of Fi 1.- Like numerals re er to similar parts in the several figures; Y f 1 A I In Fig. 1 of, the drawing I have shown a 7 machine of the well known shortwall type having a main frame 1 adapted to' rest upon and slide in any directionover the floor of amine, Mounted upon the frame 1 are two winding drums2 and 3, upon which are windm able the feeding and guiding ropes 4 and 5, respectively. Theropes l and 5 areadapted to be attached to suitably positioned anchor-' ,ing devices external of'the machine, and the; drums 2 and 3 are provided with suitable s actuating and controlling mechanism where:

, tion and description is by suitable draft may be applied to said ropes to move and the material to be mined in the manner which is well understood in themining machine art.

, The main frame 1 constitutes the magnetic field frame of an electric motor havinga longitudinally disposed armature shaft 5, whereby the several elements of the machine are actuated. Means is provided for the supply and control of the electric current for the actuation of said motor, but such devices are well understood in the art and their illustranot thought to be' required at this time. The main frame 1 comprises a sole plate upon which the machine is adapted to rest and be moved over the floor of a mine. The main frame also comprises a horizontal integral web 13 spaced somewhat above sole plate 13, and between web 13 and an upwardly offset portion of sole plate 13 is secured a cutter frame 6. Guideways are formed along the lateral edges of the cutter frame, and in them travels a cutter chain 7 of the well known type having renewable cutter bits 8 adapted to engage a coal body to cut a kerf therein. The cutter chain 7 passes around and is actuated by a sprocket wheel 9, which is keyed to the lower end of a vertical shaft 10. The shaft 10 is journaled at its lower end in a sleeve bearing 11 formed integrally with web 13. Shaft .10 is positioned in bearing 11 by'means of an annular flange 12, which bears upon the upper faceof the bearing so as to support the shaft with its lower end in proximity to the upper surface of the sole plate. In order that the vertical dimensions of the machine may be reduced without the impairment, of the strength and efiiciency of the parts, the sleeve 11' is given a considerable downward eXtent'so as to insure ample bearing surfaces for the shaft 10. As here-shown, the lower edge of the bearing extends somewhat below the medial horizontal plane of guide the machine relative to r naled in the hub 16; of a' beveligear wheel 20. The hub 16' is concentrically arranged. within the hub, 16,0fa further bevel gear 17 ,1 thisl'atter'h'ub 'b'ein-gjournaled in a bearing the-chainto-remain idle. .7 r

18 of the machine frame. j Gear wheels :20

and 17 are secured together in the construe;

tion illustrated, but they; can, of course, be made integral.

The bevel gear 17 isengagedby ia bevel pinionf'19rv fixed to the forward end of the armature shaft 5. r The bevel gear 20 has fo-rmed:on :itsilower surface clutch teeth 21:

adapted to cooperate with similar teeth on ,-'the clutch member 22, which is splined to shaft 10. A suitable shifting mechanism is provided whereby the clutchm'einber 22 may 7 be movedvupwardly into engagement wlth' the teeth 21 to drive. the shaft 10 and actuate thecutterzc'hain 7, 01: it maybe moved downwardlyfiout of such engagement to permit Formed in the fame casting is an oil 7 reservoir 23 from which leads an oil duct 24 a communicating with-the annular groove 25' formedinthe hub16, of the bevel gear 17;

' thereby'ginsuring a supply of'lubr icant for the bearingsurfaces-15 and 16; Journ'aleda'nbearings? 28 and 29 of-the rAf-noilhduct 2 6 extending-from thegroove 25 through-the metalof'the hubs 16 and 16 'o establishes the 1 passage for oil between the oil reservoir 23 and the reservoir or cavity 27, in the hub 16.above the-end of" shaft 10,

mainframe is a horizontally extending shaft 30jto theinner end oflwhich. is fixed a bevel gears 31 which mesheswith thebevel gear 20.

I The; shaftBO; is held against longitudinal the bearings' 28'andw29 respectively.- The movementiby'the engagement of the hub 32 and the mutilated collar 33fwith' the ends of mutilated collari33;is formed integral with I the sharpeo and-"issha'ped .to provide clutch "jaws Mfr-adapted to engage corresponding jaws formed on thegend of. a sleeve, 35. The sleeve-.35; is rotatably and slidably mountedon theishaft30joutside of the bearing 29, and

7 held in-clutchengagedposition'or in'ldi'sena gaged position. ormed; on the outer end V vhorizontal planes of'the cutter an is, provided, with two; spaced apart annular rooves 5 3.6 and stam ed to engage the end of a dete'nt-pin e'fiwhereby said sleeve may be i 'of'thesle'eve 35'is a rocketjwhee1'39adapted to'engage asuitablefdriving chain not shown, tithe drawing; These parts 'are 'so' propor'f be applied to the axles of the truck to propel it along the track of'the mine in themanner which is'well understood in the mining machineart. 1 a I "By the arrangement 'of parts above detransmission mechanism for the actuation of the cutter chain of aminlngmachine such as abovedescribed, havinggreat strength,

durabilityandv efiiciency, and of reduced lverticalfdiniensions suitable for use in ex- 7 tremely th n velns of coal, combined with convenient and efficient mechanism for the transmission; of power to the 'propelling mechanism of a truck adapted 'to transport-osaid mining machine from: oneworking place to another. I a

" WhatIclaimis: a a

-1. In a mining mac ine of ithe class 'de scribed, the combination with a main frame, of amotor'mounted thereon, a'ge'ar wheel operatively connected withsaidmotor and having a cylindrical hubrotatably mounted in a ournal bearing of: said frame; a' shaft rotatably mounted in a journal befaringwith in said hub, means to operatively connectsaid gear? with, said shaft, an oil reservoir formed insaid frameadjacent said journal bearing andhavingan oil duct communicating with anannulargroove insaid hubfand a-n oil duct vextending through the, metal 'of said hub from said annular groove to the. bearing within said hub as and for'the' purpose set f th; 7 V

2. :In a mining machine, a' frame iof" relatively small'over-a ll heig'ht, a bottom plate onwhich the frame is adaptedto support-=1 edfor movementover the floor of a mine, a

' horizontal uniplanar" web portion integral with theframe and spacedabove said bottom vscribecLlI have provided improved power plate, a cutter bar secured beneath said web" portion and Withthe top surface of-the cutter bar against the lower. surface of saidweb,

portion, cutter bits circulatory about saidba-r' to out a;horizontalkerfsubstantially at floor level, a vertical sleeve bearingiintegral' with I saidweb portion tothe rear ofo-said cutter bar, thelower end of'saidfsl'eeve bearingjex- 1 tending below the medial'horiz'ontal plfaneof-r said cutter bar, a shaft ournaledi in "said bearing and extending below fthe 'ilower ex lower endof said bearing and lying in medial 3; In a m'achinepa framag ertitremity of the latter, anda dishedi's'procketl i 1 wheelhaving its hub secured tothe lower end of saidoshaft and its rimlsurrounding the, V

bearing formed in said frame, and a gear having a hub j ournaled in said bearing about the upper end of the shaft, and rotatable relative to the latter,-the hubprojecting above the end of the shaft to form a lubricant-receiving cavity.

4:. In a mining machine, a frame, a vertical shaft having its upper end disposed in a bearing formed in said frame, a gear having a hub journaled in said bearing about the upper end of the shaft, and rotatable relative to the latter, the hub projecting above the end of the shaft to form a lubricantreceiving cavity, the periphery of the hub within the bearing being annularly grooved, a duct communicating the groove with the cavity, and a lubricant reservoir in communication with said groove.

5. In a mining machine, a frame of relatively small over-all height, a bottom plate on which the frame is adapted to be supported for movement over the floor of a mine, a horizontal uniplanar web portion integral with the frame and spaced above said bottom plate, a cutter bar secured between said web portion and an upwardly offset portion of said bottom plate, a vertical sleeve bearing integral with saidweb portion to the rear of said cutter bar, the lower end of said sleeve bearing extending below the medial horizontal plane of said cutter bar, a shaft journaled in said bearing and extending below the lower extremity of the latter, a

, dished sprocket wheel having its hub secured to the lower end of said shaft and its rim surrounding the lower end of said bearing and lying in medial horizontal planes of the cutter bar, a downwardly faced beveled gear concentric with the upper end of said shaft,

clutch means comprising a member slidable on said shaft betweenisaid gear andsleeve bearing, and a motor disposed within the upper and lower limits of the main frame and having a horizontally extending armature shaft provided with a pinion engaging said gear.

6. In a mining machine, a frame of relatively small overall height, a bottom plate on which the frame is adapted to be supported for movement over the floor of the mine, a horizontal uni-planar web portion integral with the frame and spaced above said bottom kerf substantially at floor level, a vertical sleeve bearing integral with said web portion to the rear of said cutter bar, the lower end of said sleeve bearing extending below the medial horizontal plane of said cutter bar, a shaft journaled in said bearing and extendmg below the lower extremity of the latter, and a dished sprocket wheel having its hub secured to the lower end of said shaft and its rim surrounding the lower end of said bearing and lying in medial horizontal planes of the cutter bar.

In testimony whereof I have hereunto set my hand.

NILS D. LEVIN. 

